.header {
    background-color: #333;
    color: #fff;
    padding: 20px;
}

.sidebar {
    background-color: #f8f9fa;
    padding: 10px;
    height: 100vh;
}

.sidebar-brand {
    font-size: 24px;
    font-weight: bold;
    margin-bottom: 20px;
}

.sidebar-menu ul {
    list-style: none;
    padding: 0;
    margin: 0;
}

.sidebar-menu li {
    margin-bottom: 8px;
}

.sidebar-menu li a {
    display: block;
    padding: 10px 20px;
    color: #555;
    text-decoration: none;
    transition: background-color 0.3s;
}

.sidebar-menu li a:hover {
    background-color: #eee;
}

.active a {
    background-color: #eee;
    color: #333;
}

.main-content {
    padding: 20px;
}